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Programming Language (C��, QBASIC, Pascal, etc.)
31. Given a periodic pulse train such as that in Fig. 24.11,
write a program to determine the average value, given the
base-line voltage, peak value, and duty cycle.
32. Given the initial and final values and the network parameters
R and C, write a program to tabulate the values of
GLOSSARY
Actual (true, practical) pulse A pulse waveform having a
leading edge and a trailing edge that are not vertical, along
with other distortion effects such as tilt, ringing, or overshoot.
Amplitude of a pulse waveform The peak-to-peak value of
a pulse waveform.
Attenuator probe A scope probe that will reduce the
strength of the signal applied to the vertical channel of a
scope.
Base-line voltage The voltage level from which a pulse is
initiated.
Compensated attenuator probe A scope probe that can
reduce the applied signal and balance the effects of the
input capacitance of a scope on the signal to be displayed.
Duty cycle Factor that reveals how much of a period is
encompassed by the pulse waveform.
Fall time (t f) The time required for the trailing edge of a
pulse waveform to drop from the 90% to the 10% level.
Ideal pulse A pulse waveform characterized as having vertical
sides, sharp corners, and a flat peak response.
GLOSSARY ⏐⏐⏐ 1121
vC at each time constant (of the first five) of the transient
phase.
33. For the case of T/2 < 5t, as defined by Fig. 24.29, write
a program to determine the values of vC at each halfperiod
of the applied square wave. Test the solution by
entering the conditions of Example 24.10.
Negative-going pulse A pulse that increases in the negative
direction from the base-line voltage.
Periodic pulse train A sequence of pulses that repeats itself
after a specific period of time.
Positive-going pulse A pulse that increases in the positive
direction from the base-line voltage.
Pulse repetition frequency (pulse repetition rate) The frequency
of a periodic pulse train.
Pulse train A series of pulses that may have varying heights
and widths.
Pulse width (t p) The pulse width defined by the 50% voltage
level.
Rise time (t r) The time required for the leading edge of a
pulse waveform to travel from the 10% to the 90% level.
Square wave A periodic pulse waveform with a 50% duty
cycle.
Tilt (droop, sag) The drop in peak value across the pulse
width of a pulse waveform.